Patent US4843867A successfully refreshed from Google Patents.
US4843867A
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System for monitoring sterilant vapor concentration
Assignee: American Sterilizer Co
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Filing: 1987-12-30
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Granted: 1989-07-04
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Expires: 2007-12-30
Abstract
Abstract A system is provided for determining the concentration of a condensable vapor in the presence of at least one other condensable vapor, such as hydrogen peroxide and water vapors. The system includes generally a dew point sensor, a device for measuring at least one additional property of at least the other vapor such as relative humidity, and a microprocessor for fitting the dew point and additional property measurements into a modeled construct representative of the relationship between the vapors at a plurality of concentrations for each such vapor and at a plurality of corresponding dew point measurements. When used to determine the concentration of sterilant vapor in a sterilization system, the system also includes a sterilization chamber and an injector for injecting a measured quantity of the multicomponent condensable vapor into the chamber.
Inventors
- 👤 Arthur L. Cummings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:23
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/24; A61L2/16; A61L2/20; G; G01; G01N; G01N25/00; G01N25/56; G01N25/66; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
A system for monitoring the concentration of a first vapor in the presence of at least one other vapor comprising: a chamber; means for injecting a predetermined quantity of a multicomponent vapor into said chamber, wherein said multicomponent vapor is formed from component vapors comprising a condensable first vapor and at least one other condensable vapor; means for measuring a primary property of said multicomponent vapor; means for measuring a secondary property of at least one component of said multicomponent vapor; and means for fitting said primary and secondary property measurements into a modeled construct representative of the relationship between said first vapor and said at least one other vapor at a plurality of concentrations of each said component vapor and at a plurality of said primary property measurements correlating to each said component vapor concentration.
Claim 2
Independent Claim
136 words
A system for monitoring the concentration of a first vapor in the presence of at least one other vapor comprising: a chamber; means for injecting a predetermined quantity of a multicomponent vapor into said chamber, wherein said multicomponent vapor is formed from component vapors comprising a condensable first vapor and at least one other condensable vapor; means for measuring a primary property of said multicomponent vapor; means for measuring a secondary property of at least one component of said multicomponent vapor; and means for fitting said primary and secondary property measurements into a modeled construct representative of the relationship between said first vapor and said at least one other vapor at a plurality of concentrations of each said component vapor and at a plurality of said primary property measurements correlating to each said component vapor concentration.
Claim 3
Dependent Claim
44 words
The system of claim 1 wherein said first vapor is hydrogen peroxide vapor, said other vapor is water vapor, said means for measuring a primary property is a dew point sensor and said means for measuring a secondary property is a relative humidity sensor.
Claim 4
Dependent Claim
18 words
The system of claim 1 wherein said means for measuring said secondary property is a thermal conductivity sensor.
Claim 5
Dependent Claim
41 words
The system of claim 1 wherein said means for fitting measurements is a microprocessor having means for storing said modeled construct and means for communicating data from said primary property measuring means and said secondary property measuring means to said microprocessor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |